171805221

素因数分解:

$3^2\times 7^2\times {\mathrm{223}}^1\times {\mathrm{1747}}^1$

素因数の和:1990

約数の個数: 36

約数和(自身を含む): 290140032

約数和(自身を除く): 118334811

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 223, 441, 669, 1561, 1747, 2007, 4683, 5241, 10927, 12229, 14049, 15723, 32781, 36687, 85603, 98343, 110061, 256809, 389581, 770427, 1168743, 2727067, 3506229, 8181201, 19089469, 24543603, 57268407, 171805221]

約数ペア:

[(1, 171805221), (3, 57268407), (7, 24543603), (9, 19089469), (21, 8181201), (49, 3506229), (63, 2727067), (147, 1168743), (223, 770427), (441, 389581), (669, 256809), (1561, 110061), (1747, 98343), (2007, 85603), (4683, 36687), (5241, 32781), (10927, 15723), (12229, 14049)]